| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #undef ZERO |
| #undef HALF |
| #undef ONE |
| #undef ftype |
| #undef SAMPLE_FORMAT |
| #if DEPTH == 32 |
| #define SAMPLE_FORMAT float |
| #define ftype float |
| #define ONE 1.f |
| #define HALF 0.5f |
| #define ZERO 0.f |
| #else |
| #define SAMPLE_FORMAT double |
| #define ftype double |
| #define ONE 1.0 |
| #define HALF 0.5 |
| #define ZERO 0.0 |
| #endif |
| |
| #define fn3(a,b) a##_##b |
| #define fn2(a,b) fn3(a,b) |
| #define fn(a) fn2(a, SAMPLE_FORMAT) |
| |
| #if DEPTH == 64 |
| static double scalarproduct_double(const double *v1, const double *v2, int len) |
| { |
| double p = 0.0; |
| |
| for (int i = 0; i < len; i++) |
| p += v1[i] * v2[i]; |
| |
| return p; |
| } |
| #endif |
| |
| static ftype fn(fir_sample)(AudioRLSContext *s, ftype sample, ftype *delay, |
| ftype *coeffs, ftype *tmp, int *offset) |
| { |
| const int order = s->order; |
| ftype output; |
| |
| delay[*offset] = sample; |
| |
| memcpy(tmp, coeffs + order - *offset, order * sizeof(ftype)); |
| |
| #if DEPTH == 32 |
| output = s->fdsp->scalarproduct_float(delay, tmp, s->kernel_size); |
| #else |
| output = scalarproduct_double(delay, tmp, s->kernel_size); |
| #endif |
| |
| if (--(*offset) < 0) |
| *offset = order - 1; |
| |
| return output; |
| } |
| |
| static ftype fn(process_sample)(AudioRLSContext *s, ftype input, ftype desired, int ch) |
| { |
| ftype *coeffs = (ftype *)s->coeffs->extended_data[ch]; |
| ftype *delay = (ftype *)s->delay->extended_data[ch]; |
| ftype *gains = (ftype *)s->gains->extended_data[ch]; |
| ftype *tmp = (ftype *)s->tmp->extended_data[ch]; |
| ftype *u = (ftype *)s->u->extended_data[ch]; |
| ftype *p = (ftype *)s->p->extended_data[ch]; |
| ftype *dp = (ftype *)s->dp->extended_data[ch]; |
| int *offsetp = (int *)s->offset->extended_data[ch]; |
| const int kernel_size = s->kernel_size; |
| const int order = s->order; |
| const ftype lambda = s->lambda; |
| int offset = *offsetp; |
| ftype g = lambda; |
| ftype output, e; |
| |
| delay[offset + order] = input; |
| |
| output = fn(fir_sample)(s, input, delay, coeffs, tmp, offsetp); |
| e = desired - output; |
| |
| for (int i = 0, pos = offset; i < order; i++, pos++) { |
| const int ikernel_size = i * kernel_size; |
| |
| u[i] = ZERO; |
| for (int k = 0, pos = offset; k < order; k++, pos++) |
| u[i] += p[ikernel_size + k] * delay[pos]; |
| |
| g += u[i] * delay[pos]; |
| } |
| |
| g = ONE / g; |
| |
| for (int i = 0; i < order; i++) { |
| const int ikernel_size = i * kernel_size; |
| |
| gains[i] = u[i] * g; |
| coeffs[i] = coeffs[order + i] = coeffs[i] + gains[i] * e; |
| tmp[i] = ZERO; |
| for (int k = 0, pos = offset; k < order; k++, pos++) |
| tmp[i] += p[ikernel_size + k] * delay[pos]; |
| } |
| |
| for (int i = 0; i < order; i++) { |
| const int ikernel_size = i * kernel_size; |
| |
| for (int k = 0; k < order; k++) |
| dp[ikernel_size + k] = gains[i] * tmp[k]; |
| } |
| |
| for (int i = 0; i < order; i++) { |
| const int ikernel_size = i * kernel_size; |
| |
| for (int k = 0; k < order; k++) |
| p[ikernel_size + k] = (p[ikernel_size + k] - (dp[ikernel_size + k] + dp[kernel_size * k + i]) * HALF) * lambda; |
| } |
| |
| switch (s->output_mode) { |
| case IN_MODE: output = input; break; |
| case DESIRED_MODE: output = desired; break; |
| case OUT_MODE: output = desired - output; break; |
| case NOISE_MODE: output = input - output; break; |
| case ERROR_MODE: break; |
| } |
| return output; |
| } |
| |
| static int fn(filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
| { |
| AudioRLSContext *s = ctx->priv; |
| AVFrame *out = arg; |
| const int start = (out->ch_layout.nb_channels * jobnr) / nb_jobs; |
| const int end = (out->ch_layout.nb_channels * (jobnr+1)) / nb_jobs; |
| |
| for (int c = start; c < end; c++) { |
| const ftype *input = (const ftype *)s->frame[0]->extended_data[c]; |
| const ftype *desired = (const ftype *)s->frame[1]->extended_data[c]; |
| ftype *output = (ftype *)out->extended_data[c]; |
| |
| for (int n = 0; n < out->nb_samples; n++) { |
| output[n] = fn(process_sample)(s, input[n], desired[n], c); |
| if (ctx->is_disabled) |
| output[n] = input[n]; |
| } |
| } |
| |
| return 0; |
| } |